July 2010 Doc ID 17139 Rev 1 1/35 UM0912 User manual STEVAL-CCH002V2: HDMI and video switches demonstration board Introduction This user manual explains the functions and operation of a demonstration board which supports STHDMI002A, STDVE103A, STDVE001A, STMAV340, and STHDMI002A digital switches/equalizers, and STMAV335 and STMAV340 analog switches, and also different analog buffers and protection devices for analog and digital lines. The objective of this demonstration board is to display the capabilities of ST's video switches and buffers and also the appropriate use of signal line protection devices, which have been exhaustively used in this demonstration board at all I/O lines, analog video lines, and high speed transition minimized differential signaling (TMDS) digital signals. The board consists of different input/output connectors and supports various signal formats - VGA (RGB), Y Pb Pr (component video), DVI-I Analog, CVBS (composite video), and S-video in the analog domain and HDMI, DVI-I digital in the digital domain. Demonstration of the various devices is done through appropriate jumper settings on the demonstration board. A 16 character x 2 line backlit alphanumeric LCD, driven by a pre-programmed microcontroller, is also present, which senses the selection lines and displays the active device/signals, switched on, on the LCD. Figure 1. STEVAL-CCH002V2 demonstration board The demonstration board also demonstrates, to a large extent, the recommended PCB layout in end applications utilizing these devices especially for high speed HDMI data lines. www.st.com
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July 2010 Doc ID 17139 Rev 1 1/35
UM0912User manual
STEVAL-CCH002V2: HDMI and video switchesdemonstration board
IntroductionThis user manual explains the functions and operation of a demonstration board which supports STHDMI002A, STDVE103A, STDVE001A, STMAV340, and STHDMI002A digital switches/equalizers, and STMAV335 and STMAV340 analog switches, and also different analog buffers and protection devices for analog and digital lines.
The objective of this demonstration board is to display the capabilities of ST's video switches and buffers and also the appropriate use of signal line protection devices, which have been exhaustively used in this demonstration board at all I/O lines, analog video lines, and high speed transition minimized differential signaling (TMDS) digital signals. The board consists of different input/output connectors and supports various signal formats - VGA (RGB), Y Pb Pr (component video), DVI-I Analog, CVBS (composite video), and S-video in the analog domain and HDMI, DVI-I digital in the digital domain. Demonstration of the various devices is done through appropriate jumper settings on the demonstration board. A 16 character x 2 line backlit alphanumeric LCD, driven by a pre-programmed microcontroller, is also present, which senses the selection lines and displays the active device/signals, switched on, on the LCD.
Figure 1. STEVAL-CCH002V2 demonstration board
The demonstration board also demonstrates, to a large extent, the recommended PCB layout in end applications utilizing these devices especially for high speed HDMI data lines.
● Analog switches selection jumper set (21,22,23,24)
● Digital switches selection jumper set (25,26,27,28)
● Power supply section (20)
● Reset switch (30)
● 16 * 2 alphanumeric LCD (29)
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1.1 Power supply unitThe board is equipped with a power jack into which an external DC adaptor (7 V-12 V: 1 A) can be plugged into. The source need not be regulated and the onboard regulators supply 5 V or 3.3 V as required. The two LEDs D2 (red) and D3 (green) show the presence of 5 V and 3.3 V supplies onboard.
Note: Care must be taken while operating as the heat sink onboard may become significantly hot.
Figure 3. Power section
1.2 Various input/output connectorsThe demonstration board supports different video connectors supporting corresponding signal formats:
● VGA input - output connectors
● S-video input -output connectors
● Y Pb Pr input-output connector set
● CVBS input - output connectors
● HDMI input-output connectors
● DVI-I connector
Figure 4. VGA connector
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Figure 5. Component and CVBS connector
Figure 6. S-Video connector
Figure 7. HDMI and DVI input connector
Figure 8. HDMI output connector
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1.3 Onboard jumpersThe board consists of different sets of jumpers for operating the switches. Jumper sets 21, 22, 23 and 24, as depicted in Figure 2, are for selection and operation of analog switches (STMAV335 and STMAV340), while jumper sets 25, 26, 27 and 28 are used for selection and operation of digital switches (STHDMI002A/STDVE001A and STDVE103A).
Figure 9. Jumper configurations
1.4 Alphanumeric displayAn alphanumeric LCD is provided on the board which displays the current active switch and the signal set being switched by this switch from input to output. In the case of the wrong selection, an error message “Improper Sel” is displayed. The display changes according to the configuration of the jumpers (J4, J5, J9, J10, J16, J17, J3, J11, and J12) present on the board.
1.5 Reset switchThe RESET button resets the processor in case it gets “hung up”. Pressing the reset button DOES NOT affect the functioning of the board except the display.
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2 Getting started
2.1 Package contentsThe HDMI and Video switches demonstration board package includes:
● Hardware: one demonstration board - STEVAL-CCH002V2
2.2 System requirementsThe system operates in standalone mode through external powering using any general purpose 9 V adaptor with a current rating greater or equal to 1 A.
2.3 Powering on the systemConnect the 9 V DC adaptor to the DC jack connector. At power-on a startup message appears, as shown in Figure 10, and remains for about 2 seconds.
Figure 10. Alphanumeric LCD
After about 2 seconds, the display changes to show the current selection. (Active switch and signals being switched, if any).
Jumper selection, as shown in Figure 11, “No switch active”, means no switch/equalizer is active and the corresponding message is shown on the LCD.
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Figure 11. No switch active
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3 Demonstration of switches/buffers
3.1 Demonstrating STMAV335: VGA ActivePlace the jumper connections, as depicted in Figure 12. The appropriate message is displayed. Connect one VGA cable from source to VGA_IN (onboard) and another VGA cable from VGA_OUT (board) to sink (TV). The corresponding display can be seen on the TV/Monitor after its appropriate source selection.
Figure 12. VGA active
3.2 Demonstrating STMAV335: DVI-I analog activePlace the jumper connections, as shown in Figure 13. The appropriate message is displayed. Connect one DVI-I cable from source to DVI_IN and a VGA cable from VGA_OUT to sink (TV). The corresponding display can be seen on the TV/Monitor after its appropriate source selection.
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Figure 13. DVI-I analog active
3.3 Demonstrating STMAV335: S-Video and CVBS activePlace the jumper connections, as shown in Figure 14. Connect one S-Video cable and one RCA cable from source to S_VIDEO_IN and CVBS_IN respectively, and another pair from S_VIDEO_OUT and CVBS_OUT to the respective sink inputs. The corresponding display can be seen on the TV after its appropriate source selection.
Figure 14. S-Video and CVBS active
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3.4 Demonstrating STMAV340: VGA and CVBS activePlace the jumper connections, as shown in Figure 15. Connect one VGA cable and RCA cable from source to VGA_IN and CVBS_IN respectively, and another pair from VGA_OUT and CVBS_OUT to the respective sink inputs. The corresponding display can be seen on the TV after its appropriate source selection.
Figure 15. VGA and CVBS active
3.5 Demonstrating STMAV340: Y Pb Pr activePlace the jumper connections, as shown in Figure 16. Connect three RCA cables from source to Y_IN, PB_IN, PR_IN and another group from Y_OUT, PB_OUT, PR_OUT to the respective sink inputs. The corresponding display can be seen on the TV after its appropriate source selection.
Figure 16. Y Pb Pr active
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3.6 Demonstrating STHDMI002A/STDVE001A: HDMI_IN1 activePlace the jumper connections, as shown in Figure 17. Connect a HDMI cable from source to HDMI_IN1 and another one from HDMI_OUT1 to the respective sink input. The corresponding display can be seen on the TV after its appropriate source selection.
Figure 17. HDMI_IN1 active
3.7 Demonstrating STHDMI002A/STDVE001A: HDMI_IN2 ActivePlace the jumper connections, as shown in Figure 18. Connect a HDMI cable from source to HDMI_IN2 and another one from HDMI_OUT1 to the respective sink input. The corresponding display can be seen on the TV after its appropriate source selection.
Figure 18. HDMI_IN2 active
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3.8 Demonstrating STDVE103A: HDMI_IN3 ActivePlace the jumper connections, as shown in Figure 19. Connect a HDMI cable from source to HDMI_IN3 and another one from HDMI_OUT2 to the respective sink input. The corresponding display can be seen on the TV after its appropriate source selection.
Note: J13, J14 can be used for the Equalizer settings of STDVE001A, and J15 for output de-emphasis adjustment. (J15 On =>3 dB, J15 Off =>0dB).
● J13 on, J14 on: 16 dB
● J13 on, J14 off: 9 dB
● J13 off, J14 on: 4 dB
● J13 off, J14 off: 11 dB
The default configuration is: J13, J14 off and J15 on.
Figure 19. HDMI_IN3 active
3.9 Demonstrating STDVE103A: HDMI_IN4 activePlace the jumper connections, as shown in Figure 20. Connect a HDMI cable from source to HDMI_IN4 and another one from HDMI_OUT2 to the respective sink input. The corresponding display can be seen on the TV after its appropriate source selection.
Note: J13 and J14 can be used for the equalizer settings of STDVE001A, and J15 for output de-emphasis adjustment. (J15 On =>3 dB, J15 Off =>0dB).
● J13 on, J14 on: 16 dB
● J13 on, J14 off: 9 dB
● J13 off, J14 on: 4 dB
● J13 off, J14 off: 11 dB
The default configuration is: J13, J14 off and J15 on.
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Figure 20. HDMI_IN4 active
3.10 Demonstrating STDVE103A: DVI-I digital activePlace the jumper connections, as shown in figure below. Connect a DVI-I cable from source to DVI_IN and another one from HDMI_OUT2 to the respective sink input. The corresponding display can be seen on the TV after its appropriate source selection.
Note: J13 and J14 can be used for the equalizer settings of STDVE001A, and J15 for output de-emphasis adjustment. (J15 on =>3 dB, J15 off =>0dB).
● J13 on, J14 on: 16 dB
● J13 on, J14 off: 9 dB
● J13 off, J14 on: 4 dB
● J13 off, J14 off: 11 dB
The default configuration is: J13, J14 off and J15 on.
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